Going to school without breakfast is bad for your health.

问题描述:

Going to school without breakfast is bad for your health.
Go to bed early and get up early.这两个句子有什么区别,第二个句子为什么不说成Going to bed early and get up early?

【Going to school 】without breakfast is bad for your health.
这个句子是主系表结构, 括号内是动名词做主语.
【Go】 to bed early and 【get 】up early.
这是祈使句,所以用动词原形.
不能改成Going to bed early and get up early. 因为and是并列连词,前后谓语动词要一致!